EMD MP15DC
EMD MP15DC |
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Mosaic 212, an EMD MP15DC Fort Meade, Florida |
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Specifications |
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Configuration:
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• AAR | B-B |
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Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
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Trucks | Blomberg B |
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Wheel diameter | 40 in (1,016 mm) |
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Minimum curve | 55° (107 ft (32.614 m): 0–2 |
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Wheelbase | 24 ft 2 in (7.366 m) between bolsters; 9 ft 0 in (2.743 m) between axles in each truck |
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Length | 47 ft 8 in (14.53 m) or 48 ft 8 in (14.83 m) depending on build date |
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Width | 10 ft 0+3⁄4 in (3.067 m) |
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Height | 15 ft 0 in (4.57 m) |
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Loco weight | 248,000 lb (112,493 kg): 0–1 |
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Fuel capacity | 1,100 or 1,400 US gal (4,200 or 5,300 L; 920 or 1,170 imp gal) |
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Lubricant cap. | 197 or 284 US gal (746 or 1,075 L; 164 or 236 imp gal) |
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Coolant cap. | 230 US gal (871 L; 192 imp gal) |
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Sandbox cap. | 0.849 or 1.133 m3 (30.0 or 40.0 cu ft) |
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Prime mover | EMD 12-645E |
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RPM: | |
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• RPM low idle | 235 RPM |
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• RPM idle | 318±4 RPM (normal) 517±15 RPM (switching 2 mode) |
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• Maximum RPM | 904±4 RPM |
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Engine type | V12 diesel |
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Aspiration | Mechanical |
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Displacement |
- 645 cu in (10.57 L) / cyl
- 7,740 cu in (126.8 L)
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Generator | D32 |
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Traction motors | 4 × D77/78 DC |
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Cylinders | 12 |
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Cylinder size | 9+1⁄16 in × 10 in (230 mm × 254 mm) |
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Gear ratio | 62:15 |
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Performance figures |
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Maximum speed | 65 mph (104.6 km/h): 0–2 |
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Power output | 1,500 hp (1,119 kW) |
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Tractive effort | 62,000 lbf (275.79 kN) |
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The EMD MP15, sometimes referenced as MP15DC, is a 1,500 hp (1,119 kW) diesel–electric road switcher locomotive model produced by General Motors' Electro-Motive Division between 1974 and 1980. It was equipped with a V12 12-645E engine sporting a Roots blower. The length was either 47 ft 8 in (14.53 m) or 48 ft 8 in (14.83 m) depending on the build date.
The early MP15 and the SW1500 were similar in appearance and applications. They were fitted with the same engine in a similar appearance. The primary difference is the MP15's standard Blomberg B trucks.
Development
Switchers up to the SW1500 had been restricted to AAR type A switcher or Flexicoil lightweight trucks, both with a 96 in (2,438 mm) wheelbase. In 1973 60 special order Mexico-only SW1504s were built on a slightly longer frame, allowing EMD's standard Blomberg B trucks, with a 108 in (2,743 mm) wheelbase, to be used. In EMD's eyes (among others) this made the new locomotive a road switcher rather than a pure switcher, since it was capable of road speeds up to 60 mph (97 km/h) or so. The new model MP15DC designation thus meant Multi-Purpose locomotive, 1500 hp, DC generator. Originally the locomotive was simply designated the MP15; the arrival of the alternator/rectifier MP15AC in 1975 changed the name.
With the success of the MP15, there was a demand for a model with an advanced AC drive system. The MP15AC replaced the MP15DC's DC generator with an alternator producing AC power which is converted to DC for the traction motors with a silicon rectifier. The MP15AC is 1.5 ft (457 mm) longer than an MP15DC, the extra space being needed for the rectifier equipment. The alternator-rectifier combination is more reliable than a generator, and this equipment became the standard for new diesel-electric locomotive designs.
The MP15AC is easily distinguished from the DC models. Instead of the front-mounted radiator intake and belt-driven fan used on all previous EMD switchers, these have intakes on the lower forward nose sides and electric fans. Side intakes allowed the unit to take in cooler air, and the electric fans improved a serious reliability issue found in its earlier DC sisters.
Engine
The MP15 used a 12-cylinder version of the 645E series engine developing 1,500 hp at 904±4 rpm. Introduced in the SW1500, this was a 2-stroke, 45-degree V type, with a 9 1⁄16-inch bore by 10-inch stroke, giving 645 cubic inches displacement per cylinder.: 0–1, 7B-SSS-1 The 645 series, introduced in 1966, was EMD's standard engine through the 1980s.: 26
Original buyers
Railroad |
Quantity |
Road numbers |
Notes
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Alcoa |
1 |
7 |
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Alton and Southern Railway |
1 |
1522 |
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Altos Hornos de México |
5 |
146–148, 159, 166 |
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American Cyanamid |
2 |
18, 19 |
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Arizona Public Service |
1 |
2 |
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Bauxite and Northern Railway |
2 |
15, 16 |
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BC Hydro |
3 |
151–153 |
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Belt Railway of Chicago |
4 |
533–536 |
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Birmingham Southern Railroad |
2 |
260, 261 |
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Cambria and Indiana Railroad |
2 |
19, 20 |
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Chicago and Northwestern |
15 |
1302–1316 |
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Cities Service |
1 |
109 |
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Conn. Davison Chemical Division |
4 |
121, 122, 131, 132 |
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Genesee and Wyoming Railroad |
2 |
45, 46 |
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Georgetown Railroad |
2 |
1011, 1012 |
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Graysonia, Nashville & Ashdown Railroad |
1 |
80 |
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Gulf Oil |
1 |
101 |
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Houston Belt & Terminal Railroad |
5 |
60–64 |
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Industrial Minera México |
2 |
383, ? |
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Kansas City Southern Railway |
4 |
4363–4366 |
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Kelly's Creek and Northwestern Railroad |
2 |
1, 2 |
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Lake Erie, Franklin and Clarion Railroad |
4 |
25–28 |
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Louisville and Nashville Railroad |
10 |
5030–5039 |
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Manufacturers Railway |
3 |
251, 252, 254 |
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Metropolitan Sanitary District of Greater Chicago |
1 |
4 |
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Missouri Pacific Railroad |
62 |
1530–1554, 1356–1392 |
#1530 was the first MP15 built
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North Louisiana and Gulf Railroad |
4 |
42–45 |
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Pittsburgh and Lake Erie Railroad |
25 |
1574–1598 |
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Point Comfort and Northern Railway |
5 |
11–15 |
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Quebec Iron and Titanium |
2 |
9, 10 |
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Reading Company |
10 |
2771–2780 |
Equipped with remanufactured and renewed ALCO RS-3 truck assemblies, including the General Electric 752 traction motors. To Conrail as #9621–9630
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Rockdale, Sandow and Southern Railroad |
3 |
13–15 |
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Southern Pacific Railroad |
12 |
2690–2701 |
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Southern Railway |
88 |
2348–2435 |
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St. Louis–San Francisco Railway |
5 |
361–365 |
To Burlington Northern Railroad as #4000–4004, later renumbered to #1000–1004
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St. Mary's Railroad |
2 |
504, 505 |
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Swift Chemical Company |
1 |
1976 |
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Tennessee Eastman |
1 |
2 |
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Terminal Railway Alabama State Docks |
7 |
761, 771, 772, 801, 802, 821, 822 |
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Texas and Northern Railway |
2 |
998, 999 |
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Texas City Terminal Railway |
3 |
35–37 |
Split from the last Missouri Pacific order of MP15DCs. Painted and lettered for Missouri Pacific
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Union Railroad |
24 |
10–33 |
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U.S. Steel |
15 |
170, 955–968 |
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Total |
351 |
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See also
Notes
- ^ a b c d Solomon, Brian (June 15, 2016). Field Guide to Trains: Locomotives and Rolling Stock. Voyageur Press. p. 44. ISBN 978-0-7603-4997-7 – via Google Books.
- ^ a b c d EMD MP15DC Locomotive Service Manual (2nd ed.). Electro-Motive Division. November 1980. 32S980.
- ^ a b Pinkpank, Jerry A. (1973). The Second Diesel Spotter's Guide. Kalmbach Books. pp. 10, 12–13, 48–50. LCCN 66-22894.
- ^ a b Pinkepank, Jerry A.; Marre, Louis A. (1979). Diesel Spotters Guide Update. Kalmbach Books. pp. 4–9. ISBN 0-89024-029-9.
- ^ Johnston, Howard; Harris, Ken (2005). Jane's Train Recognition Guide. HarperCollins Publishing. pp. 414, 425. ISBN 978-0-06-081895-1.
- ^ EMD MP15 Specifications for Order A-74741. Electro-Motive Division. September 1973. 8097-5.
References
Wikimedia Commons has media related to
EMD MP15DC locomotives.
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Former | Railcars and trainsets |
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Dual-mode locomotives |
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Leased |
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See also: Amtrak paint schemes |